Intelligent position control of a variable rotational speed hydraulic pump-controlled system
Journal
Advanced Science Letters
Journal Volume
13
Pages
436-441
Date Issued
2012
Author(s)
Abstract
In the hydraulic servo systems, hydraulic valve-controlled systems have high response but low energy-efficiency; hydraulic pump-controlled systems have higher energy-efficiency, however, lower response due to the displacement adjustment via variable displacement pumps. The objective of this paper is to investigate the position control performance of high response electro-hydraulic pump-controlled systems driven by an AC servo motor with variable rotational speed. Thus, the new hydraulic pump-controlled system with an AC motor servo and a constant displacement axial piston pump is investigated for positioning control and path control. For that, an intelligent controller-adaptive fuzzy controller with self-tuning fuzzy sliding-mode compensation (AFCSTFSMC) is proposed for positioning and path control in the variable rotational speed pump-controlled system (VRSPCS). The AFC-STFSMC approach, combining the adaptive fuzzy control and the self-tuning fuzzy slidingmode control scheme, has the advantages that the fuzzy rules can be automatically adjusted and can reduce the fuzzy rules. Thus, the developed high response VRSPCS controlled by AFC-STFSMC are implemented and verified experimentally for positioning control and path control in different strokes and loading conditions. The experimental results of positioning control and path control in VRSPCS show that the developed high response VRSPCS controlled by AFC-STFSMC can achieve excellent control performance and robustness with regard to parameter variations and external disturbance. © 2012 American Scientific Publishers. All rights reserved.
SDGs
Type
journal article